Andrada Mining Extends Lithium Ridge Mineralised Trend to Nine Kilometres

• Surface mineralised trend extended from six to nine kilometres
• Grab samples returned lithium grades up to 14.72% Li2O
• Multiple new pegmatites identified beyond the primary mineralised trend
• Tin grades reached up to 7.38% Sn and tantalum up to 3,192 parts per million
• Results cover the final 734 of 1,230 grab samples collected under a licence-wide programme

Andrada Mining Limited (AIM: ATM, OTCQB: ATMTF) is a Namibia-based tin producer with a portfolio of critical mineral projects that also includes lithium, tantalum, tungsten and copper. The company works through strategic partnerships to develop Namibia's mineral resource base, with a focus on supplying raw materials used in electric vehicles, solar panels and wind turbines, while supporting communities near its operations.

Lithium Ridge Mineralised Trend Extended by 50% to Nine Kilometres

The results were generated through a licence-wide geological mapping and grab sampling programme carried out under Stage 1 of an earn-in agreement with Sociedad Química y Minera de Chile, through its subsidiary SQM Australia. The programme began in the third quarter of 2025 and used satellite and aerial imagery to identify around 1,500 outcropping pegmatites across the licence area, from which 1,230 grab samples were collected in total.

Results for the first 496 samples were reported in January 2026. This announcement covers the remaining 734 samples. Combined, the results have extended the known surface mineralisation of the main Lithium Ridge trend from six kilometres to nine kilometres.

Samples were selected for analysis based on visible indicator minerals identified during fieldwork, with additional samples taken from areas without visible mineralisation to build a broader geochemical dataset of the pegmatites across the project. All samples were collected from pegmatite material, with none taken from surrounding host rock.

High-Grade Lithium Samples Identify Multiple New Pegmatites

Of the 734 newly reported samples, 60 returned lithium grades above 1% Li2O, including 48 above 2% Li2O. The highest individual results were 14.72% Li2O and 13.77% Li2O, both recorded at the same pegmatite. These high-grade results were found at multiple pegmatites located beyond the primary mineralised trend.

Visual identification of the samples was supported by Raman Spectroscopy, a laboratory method used to confirm mineral composition, which indicated spodumene as the primary lithium-bearing mineral. Two samples from a single pegmatite returned Li2O grades above 8% and also contained elevated phosphorous levels.

Samples that returned significant lithium grades during fieldwork were also used to select drill targets for the Stage 1 diamond drilling programme, which was carried out at the same time as the surface sampling.

Andrada Mining Chief Executive Officer Anthony Viljoen said:

"The completion of the licence-wide surface sampling programme marks another important milestone in our evaluation of Lithium Ridge. The results extend the identified mineralised trend by an additional three kilometres and confirm high-grade lithium mineralisation across multiple new pegmatites, together with significant associated tin and tantalum mineralisation."

Polymetallic Upside Confirmed With Tin and Tantalum Grades

In addition to the lithium results, 160 samples returned tin grades above 0.1% Sn, and 163 samples returned tantalum grades above 75 parts per million. The highest individual results were 7.38% Sn and 3,192 ppm Ta.

Most of the samples with significant tin and tantalum grades were collected from pegmatites that also returned significant lithium grades, indicating that these metals occur together within the same rock bodies across parts of the licence area. This pattern was consistent across the results reported in this announcement.

Andrada Mining Chief Executive Officer Anthony Viljoen said:

"These results complement the encouraging diamond drilling results reported to date, which have demonstrated lithium mineralisation from surface to borehole depth and have strengthened our understanding of the scale and continuity of the broader pegmatite system. The identification of additional mineralised pegmatites beyond the principal trend further highlights the exploration potential that remains across the licence area."

Milestones and Next Steps

The Stage 1 diamond drilling programme, comprising approximately 16,500 metres, was completed in May 2026 and targeted the majority of the mineralised pegmatites identified through the mapping and sampling work. Drill samples are currently being dispatched for analysis, with further updates expected as results are received.

The grab sample data will be integrated with the drilling results to inform Andrada's mineral system model for Lithium Ridge, supporting the company's ongoing evaluation of the project under its earn-in agreement with SQM.

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